> For the complete documentation index, see [llms.txt](https://doc.engenius.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.engenius.ai/s11-user-guide/core-component-installation/servicing-cooling-and-power.md).

# Servicing Cooling and Power

This chapter covers routine maintenance tasks for components that ensure your server stays cool and powered on. You'll learn how to replace system fans, power supply units (PSUs), and the motherboard's battery.

## **Replacing a system fan module**

The server uses hot-swappable fan modules. If a fan fails, you can replace it while the server is running.

<figure><img src="https://3449293825-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FjpZbCL0qpDQTXK2bjgCk%2Fuploads%2FULG2yxvbljukw40fti1w%2FEAS1210%20FAN%20Module.png?alt=media&amp;token=e07fdbf0-1bd8-4dcf-968e-4faddd63ab88" alt=""><figcaption></figcaption></figure>

### Fan Module Overview

<table data-header-hidden><thead><tr><th width="109.7578125"></th><th></th><th></th><th width="213.4444580078125"></th><th></th></tr></thead><tbody><tr><td><strong>Fan Slot</strong> #</td><td><strong>Fan Type</strong></td><td><strong>Connector Type</strong></td><td><strong>Zone Coverage</strong></td><td><strong>Controlled By</strong></td></tr><tr><td>FAN1</td><td>8-pin PWM</td><td>Standard PWM</td><td>DIMM CPU0E-H zone </td><td>BMC</td></tr><tr><td>FAN2</td><td>8-pin PWM</td><td>Standard PWM</td><td>CPU0</td><td>BMC</td></tr><tr><td>FAN3</td><td>8-pin PWM</td><td>Standard PWM</td><td>CPU0</td><td>BMC</td></tr><tr><td>FAN4</td><td>8-pin PWM</td><td>Standard PWM</td><td>DIMM CPU0A-D zone </td><td>BMC</td></tr><tr><td>FAN5</td><td>8-pin PWM</td><td>Standard PWM</td><td>DIMM CPU1E-H zone </td><td>BMC</td></tr><tr><td>FAN6</td><td>8-pin PWM</td><td>Standard PWM</td><td>CPU1</td><td>BMC</td></tr><tr><td>FAN7</td><td>8-pin PWM</td><td>Standard PWM</td><td>CPU1</td><td>BMC</td></tr><tr><td>FAN8</td><td>8-pin PWM</td><td>Standard PWM</td><td>DIMM CPU1A-D zone</td><td>BMC</td></tr></tbody></table>

### To replace a fan module:

1. Identify the failed fan. The system's management interface (BMC) will report a failed fan.<br>

   <figure><img src="https://content.gitbook.com/content/jpZbCL0qpDQTXK2bjgCk/blobs/JmdnW6CEahcBZ582KQjy/3.8-C-1.png" alt=""><figcaption></figcaption></figure>
2. Release the fan module. Grasp the top of the fan module and press the release tab.<br>

   <div><figure><img src="https://content.gitbook.com/content/jpZbCL0qpDQTXK2bjgCk/blobs/cEsNL1qY9AaogaHeaHHZ/3.8-C-2.png" alt=""><figcaption></figcaption></figure> <figure><img src="https://content.gitbook.com/content/jpZbCL0qpDQTXK2bjgCk/blobs/u9YDqu3cwM3btLR6OIUD/3.8-C-3.png" alt=""><figcaption></figcaption></figure></div>
3. Remove the module. Lift the fan module straight up and out of the chassis.\ <br>

   <figure><img src="https://content.gitbook.com/content/jpZbCL0qpDQTXK2bjgCk/blobs/Cz7s7KS6LPbopJTsBZjK/3.8-C-4.png" alt=""><figcaption></figcaption></figure>
4. Install the new fan module. Align the new fan module with the empty slot and press it down firmly until it clicks into place.<br>

   <figure><img src="https://content.gitbook.com/content/jpZbCL0qpDQTXK2bjgCk/blobs/Nxcj6u9CGO82hWXA3Et2/3.8-D.png" alt=""><figcaption></figcaption></figure>

{% hint style="success" %}
**Best Practice: Replace failed fans immediately**

Never run the server for an extended period with a missing or failed fan.
{% endhint %}

## **Replacing a power supply unit (PSU)**

This server is equipped with two hot-swappable PSUs for redundancy.

### To replace a PSU:

1. Identify the failed PSU. A failed PSU is typically indicated by an amber or red fault LED.
2. Disconnect the power cord from the failed PSU only.
3. Remove the failed PSU. Press the release latch and pull the module straight out.\ <br>

   <figure><img src="https://content.gitbook.com/content/jpZbCL0qpDQTXK2bjgCk/blobs/euxtDk2lE8H1WO9oqyQV/Replacing%20a%20power%20supply%20unit%20(PSU).png" alt=""><figcaption></figcaption></figure>
4. Insert the new PSU until it clicks into place.
5. Reconnect the power cord.

## **Replacing the motherboard battery**

The motherboard has a coin-cell battery (CR2032) that maintains the system's clock and BIOS settings.

{% hint style="danger" %}
**Warning: Battery Safety Precautions**

* Use **only the same or equivalent type** of battery as specified by the manufacturer.
* Do not **dispose of the battery in fire or attempt to recharge it**. Risk of explosion or chemical leakage.
* Handle the battery with care. Improper handling may cause burns or short circuits.
* Dispose of used batteries in accordance with **local environmental regulations**.
  {% endhint %}

### To replace the battery:

1. Power off the server and open the chassis.
2. Locate the battery on the motherboard.\ <br>

   <figure><img src="https://content.gitbook.com/content/jpZbCL0qpDQTXK2bjgCk/blobs/IF54oK1ZwxgdkI0rfmcP/3.6-B.png" alt=""><figcaption></figcaption></figure>
3. Remove the old battery. Gently push the metal clip on the side of the holder to release it.
4. Install the new battery with the **"+"** side facing up.
5. Close the chassis and power on. You will need to enter the BIOS setup utility to re-configure the date, time, and any custom settings.


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